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AVS: Experimental Tests of a New Process to Inductively Vitrity HLW Inside the Final Disposal Containers at Very High Waste Loadings.

DE2004828352

Publication Date	2002
Page Count	18
Abstract	The design and performance capabilities of the Advanced Vitrification System (AVS) are described, together with the results of experimental tests. The AVS is an in-can melting system in which high-level waste (HLW) is vitrified directly inside the final disposal container. The AVS container, or module, consists of an outer stainless steel canister and an alumina-lined, inner graphite crucible, which is thermally insulated from the outer stainless canister. The graphite crucible is inductively heated to very high temperatures (up to 1500 C) by an external low frequency (30 Hertz) alternating current (AC) transformer coil. The actively cooled outer stainless canister remains at near ambient temperature. The HLW/frit mixture is fed into the hot graphite crucible, where it is vitrified. After cooldown, the HLW/frit feed and off-gas pipes are disconnected from the top of the module, which is then sealed and readied for shipment or storage. All radioactively contaminated melter components inside the module are disposed of along with the vitrified waste. The graphite crucible also provides a geologically stable barrier for the vitrified product. The AVS potentially can double HLW loading over that obtained from Joule melters; lower vitrification costs by about half; reduce the number of disposal canisters required by about half; handle diverse waste feeds with high concentrations of problem elements such as chromium and zirconium; and reduce the time needed to vitrify a given inventory of HLW.
Keywords	Alternate current Vitrification Radioactive waste management Ambient temperature Chromium containers Crucibles Graphite Melting mixtures Storage Transformers Waste management Wastes Zirconium Stainless steels Advance vitrification system
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	New Hampshire Health Careers Council, Concord.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514

AVS: Experimental Tests of a New Process to Inductively Vitrity HLW Inside the Final Disposal Containers at Very High Waste Loadings.

AVS: Experimental Tests of a New Process to Inductively Vitrity HLW Inside the Final Disposal Containers at Very High Waste Loadings.
DE2004828352

Publication Date	2002
Page Count	18
Abstract	The design and performance capabilities of the Advanced Vitrification System (AVS) are described, together with the results of experimental tests. The AVS is an in-can melting system in which high-level waste (HLW) is vitrified directly inside the final disposal container. The AVS container, or module, consists of an outer stainless steel canister and an alumina-lined, inner graphite crucible, which is thermally insulated from the outer stainless canister. The graphite crucible is inductively heated to very high temperatures (up to 1500 C) by an external low frequency (30 Hertz) alternating current (AC) transformer coil. The actively cooled outer stainless canister remains at near ambient temperature. The HLW/frit mixture is fed into the hot graphite crucible, where it is vitrified. After cooldown, the HLW/frit feed and off-gas pipes are disconnected from the top of the module, which is then sealed and readied for shipment or storage. All radioactively contaminated melter components inside the module are disposed of along with the vitrified waste. The graphite crucible also provides a geologically stable barrier for the vitrified product. The AVS potentially can double HLW loading over that obtained from Joule melters; lower vitrification costs by about half; reduce the number of disposal canisters required by about half; handle diverse waste feeds with high concentrations of problem elements such as chromium and zirconium; and reduce the time needed to vitrify a given inventory of HLW.
Keywords	Alternate current Vitrification Radioactive waste management Ambient temperature Chromium containers Crucibles Graphite Melting mixtures Storage Transformers Waste management Wastes Zirconium Stainless steels Advance vitrification system
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	New Hampshire Health Careers Council, Concord.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514